PAGE 1
000 B000000 07/31/2017
000 C000000 0001160990
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 PIMCO CORPORATE & INCOME STRATEGY FUND
001 B000000 811-10555
001 C000000 8443374626
002 A000000 1633 BROADWAY
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10019
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 PACIFIC INVESTMENT MANAGEMENT COMPANY LLC
008 B000001 A
008 C000001 801-48187
008 D010001 NEWPORT BEACH
008 D020001 CA
008 D030001 92660
010 A000001 PACIFIC INVESTMENT MANAGEMENT COMPANY LLC
010 B000001 801-48187
010 C010001 NEWPORT BEACH
010 C020001 CA
010 C030001 92660
012 A000001 AMERICAN STOCK TRANSFER & TRUST COMPANY LLC
012 B000001 84-00416
012 C010001 BROOKLYN
012 C020001 NY
012 C030001 11219
013 A000001 PRICEWATERHOUSECOOPERS LLP
013 B010001 KANSAS CITY
013 B020001 MO
013 B030001 64106
014 A000001 PIMCO INVESTMENTS LLC
014 B000001 8-68686
015 A000001 STATE STREET BANK & TRUST CO.
015 B000001 C
015 C010001 KANSAS CITY
015 C020001 MO
015 C030001 64105
015 C040001 1307
PAGE 2
015 E010001 X
015 A000002 BANCO NACIONAL DE MEXICO S.A.
015 B000002 S
015 C010002 MEXICO CITY
015 D010002 MEXICO
015 E040002 X
015 A000003 BNP PARIBAS SECURITIES SERVICES, S.C.A.
015 B000003 S
015 C010003 ATHENS
015 D010003 GREECE
015 E040003 X
015 A000004 CITIBANK, N.A.
015 B000004 S
015 C010004 SAO PAULO
015 D010004 BRAZIL
015 E040004 X
015 A000005 CLEARSTREAM BANKING S.A.
015 B000005 S
015 C010005 LUXEMBOURG
015 D010005 LUXEMBOURG
015 E040005 X
015 A000006 CREDIT SUISSE AG
015 B000006 S
015 C010006 ZURICH
015 D010006 SWITZERLAND
015 E040006 X
015 A000007 DEUTSCHE BANK AG
015 B000007 S
015 C010007 PARIS
015 D010007 FRANCE
015 E040007 X
015 A000008 DEUTSCHE BANK S.P.A.
015 B000008 S
015 C010008 MILAN
015 D010008 ITALY
015 E040008 X
015 A000009 FIRSTRAND BANK LIMITED
015 B000009 S
015 C010009 JOHANNESBURG
015 D010009 SOUTH AFRICA
015 E040009 X
015 A000010 HSBC BANK MIDDLE EAST LIMITED
015 B000010 S
015 C010010 UNITED ARAB EMIRATES
015 D010010 UNITED ARAB EMIRATES
015 E040010 X
015 A000011 ROYAL BANK OF CANADA
015 B000011 S
015 C010011 TORONTO
015 D010011 CANADA
015 E040011 X
PAGE 3
015 A000012 SKANDINAVISKA ENSKILDA BANKEN AB (publ)
015 B000012 S
015 C010012 HELSINKI
015 D010012 FINLAND
015 E040012 X
015 A000013 SKANDINAVISKA ENSKILDA BANKEN AB (publ)
015 B000013 S
015 C010013 OSLO
015 D010013 NORWAY
015 E040013 X
015 A000014 SKANDINAVISKA ENSKILDA BANKEN AB (publ)
015 B000014 S
015 C010014 STOCKHOLM
015 D010014 SWEDEN
015 E040014 X
015 A000015 STANDARD CHARTERED BANK (HONG KONG) LTD.
015 B000015 S
015 C010015 HONG KONG
015 D010015 HONG KONG
015 E040015 X
015 A000016 STATE STREET BANK & TRUST CO., UNITED KINGDOM
015 B000016 S
015 C010016 LONDON
015 D010016 UNITED KINGDOM
015 E040016 X
015 A000017 STATE STREET TRUST COMPANY CANADA
015 B000017 S
015 C010017 TORONTO
015 D010017 CANADA
015 E040017 X
015 A000018 THE HONGKONG & SHANGHAI BANKING CORP., LTD.
015 B000018 S
015 C010018 TOKYO
015 D010018 JAPAN
015 E040018 X
015 A000019 THE HONGKONG & SHANGHAI BANKING CORP., LTD.
015 B000019 S
015 C010019 AUCKLAND
015 D010019 NEW ZEALAND
015 E040019 X
015 A000020 THE HONGKONG & SHANGHAI BANKING CORP., LTD.
015 B000020 S
015 C010020 SYDNEY
015 D010020 AUSTRALIA
015 E040020 X
015 A000021 UNICREDIT BANK AUSTRIA AG
015 B000021 S
015 C010021 VIENNA
015 D010021 AUSTRIA
015 E040021 X
018 000000 Y
PAGE 4
019 A000000 Y
019 B000000 175
019 C000000 PIMCOFUNDS
020 A000001 AVONDALE PARTNERS, LLC
020 B000001 62-1761948
020 C000001 1
021 000000 1
022 A000001 CITIGROUP GLOBAL MARKETS, INC.
022 B000001 11-2418191
022 C000001 603400
022 D000001 18176
022 A000002 JPMORGAN CHASE & CO.
022 B000002 13-2624428
022 C000002 350130
022 D000002 198377
022 A000003 STATE STREET BANK & TRUST CO.
022 B000003 04-1867445
022 C000003 515802
022 D000003 31462
022 A000004 DEUTSCHE BANK SECURITIES, INC.
022 B000004 13-2730828
022 C000004 354264
022 D000004 10448
022 A000005 UBS SECURITIES LLC
022 B000005 13-3873456
022 C000005 5598
022 D000005 164115
022 A000006 RBC CAPITAL MARKETS, LLC
022 B000006 41-1416330
022 C000006 48846
022 D000006 86873
022 A000007 GOLDMAN SACHS & CO.
022 B000007 13-5108880
022 C000007 83665
022 D000007 13767
022 A000008 BARCLAYS, INC.
022 B000008 06-1031656
022 C000008 62110
022 D000008 18054
022 A000009 MORGAN STANLEY & CO., INC.
022 B000009 13-2655998
022 C000009 17495
022 D000009 48806
022 A000010 NOMURA SECURITIES
022 B000010 13-2642206
022 C000010 40155
022 D000010 19416
023 C000000 2235995
023 D000000 766245
024 000000 Y
025 A000001 JPMORGAN CHASE & CO.
PAGE 5
025 B000001 13-2624428
025 C000001 D
025 D000001 52652
025 A000002 CITIGROUP GLOBAL MARKETS, INC.
025 B000002 11-2418191
025 C000002 D
025 D000002 19228
025 A000003 BARCLAYS, INC.
025 B000003 06-1031656
025 C000003 D
025 D000003 10643
025 A000004 GOLDMAN SACHS & CO.
025 B000004 13-5108880
025 C000004 D
025 D000004 8727
025 A000005 MORGAN STANLEY & CO., INC.
025 B000005 13-2655998
025 C000005 D
025 D000005 3658
025 A000006 DEUTSCHE BANK SECURITIES, INC.
025 B000006 13-2730828
025 C000006 D
025 D000006 2109
025 A000007 UBS SECURITIES LLC
025 B000007 13-3873456
025 C000007 D
025 D000007 1649
025 A000008 STATE STREET BANK & TRUST CO.
025 B000008 04-1867445
025 C000008 D
025 D000008 1043
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
PAGE 6
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.810
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
PAGE 7
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 Y
054 D000000 Y
054 E000000 Y
054 F000000 Y
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 Y
054 L000000 Y
054 M000000 Y
054 N000000 Y
054 O000000 Y
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 0
062 A000000 Y
062 B000000 0.4
062 C000000 0.0
062 D000000 1.6
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
PAGE 8
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 5.7
062 O000000 4.6
062 P000000 51.9
062 Q000000 52.6
062 R000000 3.9
063 A000000 0
063 B000000 8.1
064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 Y
070 B010000 Y
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 Y
070 K010000 Y
070 K020000 N
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 N
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 Y
PAGE 9
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 303966
071 B000000 262934
071 C000000 690173
071 D000000 38
072 A000000 12
072 B000000 49523
072 C000000 924
072 D000000 0
072 E000000 0
072 F000000 5074
072 G000000 0
072 H000000 0
072 I000000 0
072 J000000 0
072 K000000 0
072 L000000 0
072 M000000 67
072 N000000 0
072 O000000 0
072 P000000 1391
072 Q000000 0
072 R000000 0
072 S000000 0
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 225
072 X000000 6757
072 Y000000 0
072 Z000000 43690
072AA000000 15010
072BB000000 0
072CC010000 51352
072CC020000 0
072DD010000 68935
072DD020000 0
072EE000000 0
073 A010000 1.7486
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0214
074 A000000 824
074 B000000 9443
074 C000000 2712
074 D000000 688004
074 E000000 21685
074 F000000 1127
PAGE 10
074 G000000 0
074 H000000 0
074 I000000 375
074 J000000 14742
074 K000000 0
074 L000000 6130
074 M000000 13733
074 N000000 758775
074 O000000 19780
074 P000000 418
074 Q000000 0
074 R010000 75578
074 R020000 0
074 R030000 0
074 R040000 8208
074 S000000 55525
074 T000000 599266
074 U010000 39121
074 U020000 0
074 V010000 15.32
074 V020000 0.00
074 W000000 0.0000
074 X000000 27776
074 Y000000 87543
075 A000000 0
075 B000000 572362
076 000000 17.92
077 A000000 Y
077 B000000 Y
077 C000000 Y
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 Y
078 000000 N
080 A000000 National Union Fire Insurance Company
080 B000000 Federal Insurance Company
080 C000000 185000
081 A000000 Y
PAGE 11
081 B000000 175
082 A000000 Y
082 B000000 250
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON
087 A020000 72200U100
087 A030000 PCN
087 B010000 PREFERRED SERIES M
087 B020000 72200U209
087 C010000 PREFERRED SERIES T
087 C020000 72200U308
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE WILLIAM G. GALIPEAU
TITLE TREASURER